What does the dashboard warning light on the Volkswagen Jetta VS5 indicate?

[DeEmma]

Reasons for the dashboard warning light being on are as follows: ECU CAN bus malfunction: Poor contact at the ECU CAN interface. Excessive dirt and carbon buildup: Abnormal air circulation, leading to inaccurate control of normal air intake, causing unstable gas content and poor engine performance. Low fuel pressure: Coupled with poor constant pressure performance, resulting in low system atomization levels, making the car difficult to start. Solutions for the dashboard warning light being on are as follows: Read the fault code: The vehicle can read the fault code via the OBD interface using a computer. If you are interested in the vehicle's mechanical and electronic systems, you can purchase a Bluetooth module for the OBD interface to view and clear fault codes using a laptop or Android phone.